Hope smiled at her brother and gestured warmly for him to enter.

"It's OK, Michael," Hope said, "I'm here for you." She opened her legs, raising her knees to give Michael easy access to her sex. Michael stood at the end of the bed, penis in his hand. He was stroking it so fast, Mary could barely see his fist.

"Are you getting close?" Hope asked. Michael just moaned and nodded.

"When you're ready," Mary said, "Don't wait too long like last time."

Michael stepped forward and lined his penis up with his sister's vagina. He did his best to still rub it as he did. Then, slowly, he moved...